Re: braided secondaries???

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ray von Postel by way of Terry Fritz <twftesla-at-uswest-dot-net>" <vonpostel-at-prodigy-dot-net>

S:

What you have is "Litzendracht (sp) wire"  also called "Litz wire".  It is
used in coils
operating at low  radio frequencies to
minimize the skin effect and thus the  r. f.. resistance.  The term "lower"
here means 200
KHz and lower .Others would argue the top frequency should be still lower.
However, it has
been used in radio transmitters operating between 20 KHz and 500 KHz . I
have seen it as
much as 2 inches in diameter in the coils of transmitters and in small
sizes as the wire
used to wind low frequency i.f.. (intermediate frequency) coils in radio
receivers.  I have
no idea where you could get a current price for Litz wire, but 30 years ago
it was as much a
10 times the cost of
enameled wire.

You will it hard to solder because each wire end has to be cleaned.  There
is is procedure
for that in some old editions of "Chemistry and
Physic's HandBook"  published by the Chemical Rubber Publishing Co.   Your
local library
should have a copy.

Winding a coil with it is the same as winding a coil with solid wire.  The
only difference
is in the way the coil will operate
at the lower frequencies.   A coil wound with Litz wire should have a
higher Q than one
wound with enameled
wire having the same cross sectional area of copper.  But, again, it
depends on the
operating frequency.

No, it will not be like 9 coils.  It will be like one unusual coil and not
a bit strange.
In fact, a secondary using Litz
could be very worth while if you have enough wire and the operating
frequency is low.

Ray

Tesla list wrote:

> Original poster: "ebyng by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<ebyng-at-netlimit-dot-com>
>
> Hello list.
> I found some neat-o wire today...
> Is 3 strands of 40 awg mag wire braided.
>
> its like they took 3 strands and braided, then did the same with the other,
> then another, then braided them all together.  It comes out to be around 23
> awg streached.
>
> If you wound a secondary with this thing, would you get the equivalent of
> having 9 coils, or just one really strange coil...?
>
> Ive got about 5# of the stuff, but no use unless it can be something
> else....
> What was it used for originally??
>
> Any guesses?
>
> Thanks
> S
>
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